Pressure and temperature control valve



U i E HARRY C. TABLER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO AMERICAN EETEB @0R-l 'i PORATION, F ST. LOUIS, MISSQURI, A COBPDRATION F MISSOURI.

PRESSURE AND TEMPERATURE CGNTRGL VALVE.

Appiation le'd'l'uly 2, 1.927.l Serial No. 203,979.

My invention-relates to safety devices-for het water heaters, boilers and. the-like. It' has for its object a device that is responsive to pressure changes and also to temperatureA ture control valve and in the parts and coml5 binations and arrangements of parts hereinafter described and claimed.

The accompanying drawing is alongitudinal sectional view of a valve embodying my invention. Y A valve housing, indicated generally by the letter H, comprises a hollow housing member 1 having a counterbored interiorly threaded end portion 2.and a second housing member 3 having an exteriorly threaded portion screwed thereinto. Said second housing member has a threaded projection 4 adapted to be screwed into the wall of a tank 5, boiler,

or other container of liquid or fluid.

Secured in the second housing member 3 and projecting into the tank or container is a tube 6 of copper or other suitable material that expands and contracts with temperature changes. Said tube has perforations rmitting water from the tank to pass into t e tube and the housing. Secured in the tube, as by being screwed into the free end'thereof, is a rod 7 of relatively non-expansible material. Mounted on the end of said rod 7 is a valve 8 that is seated against a vshoulder 9 in the end vof the bore of `said first housing member 1. Preferably the valve 8 is provided with an upstanding annular flange 10 that contacts .-withthe'shoulder 9. Thus if the tube .expands, thel rod l7 will be moved with it, carrym the valve 8 away from its seat 9'` and permitting the water or other fluid to pass from said second housing member 3, past the temperature valve-8 intothe first housing mem-r ber 1 and out through a relief opening 11 in the side wall ofthe first housing'member.

The temperature actuated valve 8 is provided with a plurality vof openings 12therethrough. Mounted in the first housing member 1 1s a valve 13 that seats against the face of the temperature valve 8 and is large enough lVlountexl in the stem l5 of said valve 13 is a large enough to cover the openings throng to cover all of the openings 12 through said temperature valve. Preferably said valve 13 is provided with an annular fiange 14 that seats against the temperature valve 8.

lill seat 16 for one end of a coil spring 17 whose other end abuts against a similar seat 18 that rests against a screw 19 in the end of the housing l.

It the pressure of the water or other Huid in the tank becomes great enough to overcome the resistance of the spring- 17, the pressure valve 13 will be lifted away from the temperature valve 8, thus permitting water to pass through the holes 12 in the temperature valve 8 into the bore of the first housing member l and out through the relief penirig 11. The pressure at which the pressure valve operates vmay be varied by turning thel screw 19 to adjust the pressure of the spring 417. v

The above described valve includes in a single housing a combination valve that is responsive to temperature and to pressure. The device is simple and d rable in construction and is an excellent safe `y device for use in* hot water heaters, boilers and other devices where either the tem rature or pressure of the water or other uid is apt toexceed a safety point. l

Obviously numerous changes may be made without departing from the invention and I *do not wish to be limit-ed to the precise construction shown.

What I claim is:

1. A valve comprising a housing adapted to be secured to a hot Water tank o r the hke and communicating with the interlor thereof, a thermosensitive memberl moun 1n said housing and'ex c ding into the tank, a relatively non-expansible rod secured to s ald thermosensitive member to move therewith, a valve on the end of said rod normally seated against a seat provided therefor 1n sald housing to prevent water from passmg out,.sa.1d valve being provided 4with openings therethrough and a second valve in said housln said first'valve andl normally a mst said first `valvezbut 'eldable under p etermined pressure of t e water in the tank, sald housing. being provided with a relief gign- 'ing on the opposite side of said valves said .tank to permit escape of water when' either of said valves is; actuated.

2. A valve ofthe kind described compns- 1 10 ing a housing having a shoulder therein and communicating with the interior of the tank,

a; thermosensitlve tube mounted` in said housing and extending into the tank, a relatively non-expansible rod secured in said tube, a'

' valve -to lnormally hold it against said first thermosensitive tube mounted in the end of valve, said. housing being provided with a relief opening on the opposite side of said valve from the tank.

3. A valve comprising a housing adapted to be secured to a hot water tank or lthe like and having a shoulder therein, a perforated said housing and extending into the tank,-a relatively non-expansible rodseeured in said tube, a valve on the end of said rod normally said valve being provided with openings therethrough, a second valve in said housing large enoughpto cover the openings through I .ing the tension of said spring. seated against said shoulder in said housing,

said first valve, and a spring acting on said second' valve to normally hold it against said first valve, said housing being provided with a relief opening on the opposite side of said valves from the tank. i

4. A valve comprising a housing adapted to be secured to a hot Water tank or the like and having a shoulder therein, a perforated thermosensitive tube mounted in the end of l therethrough, a second valve in said housing large enough to cover the openings through said first valve, a spring acting on said second valve to normally hold it against said first valve, said housing being provided with a relief opening on the opposite side of said valves from the tank, and means' for adjust- Signed at St. Louis, Missouri,

vthis 3o day of June, 1927.v l v HARRY o. TABLER. p

aid housing, l being provided with openings 40 

